The spleen and liver bursectomy increased T lymphocyte number while B cells were decreased.Converse changes were observed in thymectomized ducks.

• 脾和肝法氏囊切除显著增加了T淋巴细胞数，同时降低了B细胞数，在胸腺切除的鸭子中看到了相反的变化。